ol.event.OLHandlerRegistration Maven / Gradle / Ivy
/*******************************************************************************
* Copyright 2014, 2017 gwt-ol3
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package ol.event;
import com.google.gwt.event.shared.HandlerRegistration;
import ol.EventsKey;
import ol.Observable;
/**
* A {@link HandlerRegistration} for OpenLayers event handlers.
*
* @author sbaumhekel
*/
public class OLHandlerRegistration implements HandlerRegistration {
private EventsKey key;
private Observable observable;
/**
* Constructs an instance.
*
* @param observable
* {@link Observable}
* @param key
* key
*/
public OLHandlerRegistration(Observable observable, EventsKey key) {
this.observable = observable;
this.key = key;
}
/*
* (non-Javadoc)
*
* @see com.google.web.bindery.event.shared.HandlerRegistration#removeHandler()
*/
@Override
public void removeHandler() {
// unregister handler and remove all references
if(observable != null) {
Observable.unByKey(key);
observable = null;
key = null;
}
}
}